If you want to sponsor someone's server then find something you like and use their regular ways of sponsoring them. This doesn't sound trustworthy at all to me not to mention pretty useless. What good will a new server be for someone who already has one?
Also: you give a username / password which is no guarantee that the server doesn't have any backdoors and such. And of course people will have to take your word for all this, which doesn't really mean a lot on the Internet.
If you really want to help someone out then donate to them as specified by that server, otherwise it won't really help anyone out.